Clamp



FIG. 1 is a perspective view of a clamp of the present invention;

FIG. 2 is a side view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a rear view thereof; and

FIG. 7 is a front view thereof. 

The ornamental design for a clamp, as shown and described. 